chemoreceptors monitor what?
chemical composition of blood
where are the central chemoreceptors located?
brain stem
where are the peripheral chemoreceptors located
carotid and aortic bodies
what chemicals does the chemoreceptors monitor?
CO2, H+ , O2
what fluids do chemoreceptors monitor?
brain extracellular fluid and blood
O2 is the tightly monitored by chemoreceptors
FALSE
CO2 is the tightly monitored by chemoreceptors
TRUE
the central chemoreceptors maintain blood CO2 at what?
40mmHg (+/- 3mmHg)
use H+ concentration in cerebral spinal fluid as a monitor
for CO2 levels
central chemoreceptors
high Pco2 in blood
hypercapnia
hypercapnia affect on breathing rate and depth
increased breathing depth and rate, more CO2 expired
decrease in Pco2 of blood
hypocapnia
hypocapnia affect breathing rate how?
decreases breathing rate
hypocapnia can cause
apnea
what is hypocapnia caused by?
stress-induced hyperventilation
peripheral chemoreceptors contain cells sensitive to what ?
arterial O2 levels